Dynamic Kinetic Asymmetric Amination of Alcohols: From A Mixture of Four Isomers to Diastereo- and Enantiopure α-Branched Amines
摘要:
The first dynamic kinetic asymmetric amination of alcohols via borrowing hydrogen methodology is presented. Under the cooperative catalysis by an iridium complex and a chiral phosphoric acid, a-branched alcohols that exist as a mixture of four isomers undergo racemization by two orthogonal mechanisms and are converted to diastereo- and enantiopure amines bearing adjacent stereocenters. The preparation of diastereo- and enantiopure 1,2-amino alcohols is also realized using this catalytic system.
The Reactions of 3-Phenyl-1-butylamine-3-<sup>14</sup>C and 3-p-Anisyl-1-butylamine-3-<sup>14</sup>C with Nitrous Acid<sup>1,2</sup>
作者:Arthur W. Fort、Robert E. Leary
DOI:10.1021/ja01495a024
日期:1960.5
The diazotization of 3-phenyl-1-butylamine-3-C/sup 14/ in acetic acid gives 3-phenyl-1-butene, 3-phenyl-1-butyl acetate, and diastereoisomeric 3- phenyl-2-butyl acetates. 3-pmixture. The secondary ester products of these reactions show extensive isotope-position rearrangement. The significance of these results is discussed.